Constant temperature chamber



FIG. 1 is a perspective view of a constant temperature chamber;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a cross-sectional view thereof taken along line 4-4 in FIG. 2 wherein the internal mechanism is omitted; and,

FIG. 5 is an enlarged cross-sectional view taken along line 4-4 in FIG. 2 thereof.

The portion shown by broken lines is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a constant temperature chamber, as shown and described. 